Thursday 15 June 2017

Matariki at a New Zealand dune lake


Welcome to the Midnight Collective Broadsheet 140
Actively supporting NZ’s endangered wetland birds

Here is a dramatic solstice moment, (called Matariki over here), with the sun about to disappear behind Kapiti Island. It is after 4pm with sunset about an hour away.

Meanwhile our local weather remains inscrutable. Following a wet summer and early autumn, we now have midwinter drought, and here is the evidence with this new dune lake starting to dry up. This is unheard of for June.

And playing havoc with hydro-electricity prices. The dams are half empty causing serious spikes in spot-market prices,  but that’s what you get when you privatise your electricity supply, and place it in the hands of the gamers and the speculators. The sooner we all get our own rooftop, solar power supplies installed the better.
We continue to run into unusual sights down at the dunelake. Here is another of the  black-fronted dotterels that we reported on earlier in the year. 
Black-fronted dotterel
She seems to have taken up permanent residence. So  we will be keeping an eye out for possible signs of nesting, come August and September.  
Black-fronted dotterel 2 
We mentioned in a previous post that three pied stilts had stayed over this winter, but these have been joined by at least three more. They are difficult to count from this distance, but it’s a pleasure to see them apparently settled in this area, in an image that also shows the rich colouring of the wetland in the early morning sun.
pied stilts with sur winged plover (foreground) 
We have been keeping an eye out for the return of kahu. Our Australasian harrier hawk has given this area a wide birth since the expressway construction began but a couple of days ago we saw two wheeling together in what was a charged up courting ritual, high above the Ratanui wetland. This  is around 4 kms away, so what a delight to see them down here this morning, foraging for a feed. This is the male.
Kahu - Australasian harrier hawk
Local wildlife photographer, Roger Smith has sighted a pair of kahu regularly nesting in the raupo down at the Waikanae lagoon (4 km north) and these are probably the same two, getting ready for a new breeding season.
Closing in... Kahu takes a dive
Finally, we ran into a local couple (escapees from Brexit - with broadish English accents) who were delighted to report they had a kotare (kingfisher) in their back garden, close to the Wharemauku. We hadn’t seen kotare at all this year, but knowing they must be here, kept an eye out. And here the two of them are.
Kotare - kingfisher
 
Kotare 2
Once again it is early morning, and they were settled on top of the new lights along the cycleway. They didn’t hang around, but surely these two also, are getting ready for nesting in the spring.    
    
We have put together this short film of pied stilt and black-fronted dotterel down at the dune lake.

This features our track for today  Shaking in the Shaky Isles, from The Maori Troubadours from way back in 1960. The major force behind this group was the precocious Prince Tui Teka, who set out for Sydney at the tender age of 15, and never looked back... 
The song references our earthquake prone hinterlands
Shake shake shake
Shakin' in the Shaky Isles 
though the group was domiciled in Australia and and included an Australian  - guitarist Johnny Kealoha (Maiden name Nicol) who was born raised and remains, domiciled in Queensland...   

Wednesday 7 June 2017

Defects appear in New Zealand Expressway, 3 months after opening


Welcome to the Midnight Collective Broadsheet 139
Actively supporting NZ’s endangered wetland birds
A Rushed Job -M2PP under construction June 2016
Wharemauku Bridge under construction June 2016
Local media are reporting signs of deterioration in the recently opened M2PP expressway here in Kapiti, in the stretch between our town centre (Paraparaumu) and the Waikanae River bridge. These include tarmac cracking, discolouration and apparent sinking. These reports the NZTA have acknowledged, but played down, limiting the damage to the road surface with carefully weighted understatement as … ‘discolouration and changes to texture’.

They are monitoring the situation which, they emphasize,  does not pose a risk to motorists, despite the fact they have been unable to  pinpoint the cause. However the further statement ‘It is too early to determine a timeframe for remedial work’ appears to indicate that there are genuine engineering concerns they have yet to get to the bottom of.

What might they be? In the lack of any details coming out, here is our assessment.

We took a trip through the affected area and did indeed find signs of deterioration which the NZTA had marked out. We could photograph the general area but, putting safety first, it proved too dangerous to stop and get some close ups. However here are the results of the drive.
Joining Expressway from Kapiti Road heading north.
Marked surface heading south from Waikanae.
This surface marking is probably inconsequential (a paint spill?), but just beyond this area a long series of cracks have appeared in the centre of the left lane, and these do look problematic.
Approaching Kapiti Road exit.
Here we are preparing to leave the expressway at the Kapiti Road exit heading south. Just before this area the NZTA have marked a series of what seem to be small sinkholes that have appeared in the left lane. These are similar to potholes that have opened up in the accompanying cycleway, some of which have been marked by the NZTA in a similar way viz a viz...
Marked pothole Raumati Beach cycleway
So what might the trouble be?

These cycleway potholes have appeared after sealing and are obviously the result of sinkage in the path, after construction. The pathways and the expressway itself, were constructed from sand quarried from the sides of the expressway and the sinkage a result of settling after completion. Presumably there are ‘best practice’ rules that determine how long they should be left to settle, but with the rush to get the expressway open before the election –have they been followed? And is this also the problem with the issues affecting the expressway itself.

At the Board of Inquiry it was stated that the expressway would need to be left to settle for six months before it could be sealed, then opened. Has this direction been followed?

Another contributing cause may be the after-effects of the Kaikoura earthquake which shook up this area and resulted in liquefaction in wetland areas. This hasn’t, to our knowledge, been reported in the media. We are still seeing a lot of dirty brown water in these wetlands, a characteristic of liquefaction (rain usually turns the drains here black not brown, while the dune lake before construction began, was always clear). So what were the effects on the expressway itself of a severe two minute shake which delayed the opening for three months. The only news we have heard is that the bitumen plant was affected; not the expressway itself.

Sand is a very useful medium to use to build roadways – it’s cheap, local and easy to fabricate;  but it is erodible, and in this project has been piled over pakihi (coastal swamp), which has caused subsidence in other roads put through this area in the past. There are signs also of the sides of the expressway beginning to be eroded by water draining off the expressway. Here are photographs of some of this erosion in Raumati Beach.
Sand erosion M2PP E-way, Raumati Beach
Ditto
Repeato...
If this is happening to the ramped sides, then what is going on inside the constructed roadway and below it?

Track we were listening to while posting this? Well, this request goes out to the NZTA’s design engineers, with Lesley Gore hitting her doleful girly best, It's My Party... 
It's my party, and I'll cry if I want to
Cry if I want to, cry if I want to
You would cry too if it happened to you

This is a melody  John Lennon then picked up and morphed into the male version, though the original goes all the way back to the 18th Century and Robby Burns’ Mary Morison  
I sigh’d and said among them a’,
‘Ye are na Mary Morison